Improvement in machines for corrugating sheet metal



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Machines for Corrugating Sheet Metal;v

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Machines fer Corrug ating Sheet Metal I work a.

UNITED STATES PATENT OFFICE.

FRANKLIN BOYS, OF EAST BERLIN, CONNECTICUT.

IMPROVEMENT IN MACHINES FOR CORRUGATING S HEET MIETAL.

Specification forming part of Letters Patent No. 139,480, dated June 3, 1873; application filed March 6,1873.

To all whom it may concern:

Be it known that I, FRANKLIN RoYs, of

East Berlin, county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Sheet Metal Corrugating-Machine; and to enable others skilled in the art to make and use the same I will proceed todescribe, referring to the drawing, in which the same letters indicate like parts in each of the figures:

The nature of this invention will be understood from the specification and drawing. The object of this invention is to more perfectly, uniformly, and rapidly corrugate the sheets of metal.

In. the accompanying drawings, Figure 1 is a front elevation, some of the details of its mechanism being shown in dotted lines. Fig. 2 is an end view, showing the connections for operating the machine. Fig. 3 is a partial sectional view of the opposite end. Fig. 4 is a central cross-section.

a is the end frame-work of the machine. I) are truss-beams, firmly secured to the ends or frame-work and bound together in their fixed position by bolts 1).

c are corrugated rollers fitted 1n the boxes d in the recess of the frame- (1 are the boxes into which the end bearings of the rollers are fitted. These boxes, d and d, are made in two parts each, and are fitted closely into the recess of the end framework a. The boxes d are bedded on the bottom of the recess of the frame-work. The upper boxes, 01, are suspended in the recess of the framework by bolts 6. The upper ends of these bolts 6 pass up through the upper truss or beam, thence through the ends of a suspension-p1ate,f, and are secured and adjusted by nuts f. g is an elevating and depressing screw, having a collar above and below the plate f, and is fitted into a screw-threaded orifice in the truss b, by means of which the upper roll can be elevated, depressed, or adjusted to the thickness of the metal being corrugated. These two rollers c are connected to work together by gears h. A gear, h, is secured to the outer end of one of the rollers c, which receives and transmits power to the corrug-at-ing-rollers. '6 is an automatic reciprocating feed-table, having an adjustable gage, 'i,

to receive and introduce the sheet of metal to depth of the corrugations, into which are' carefully fitted adjustable bearingsj, o.ne arranged in the beamb, above, and one in the 'beam 1), below. These bearers are compressed to the bearing-surfaces of the rollers by hydraulic or screw pressure j, the object of which is to avoid or prevent the scale from damaging the corrugations of the rollers and to prevent them from springing in the ecu-- -ter. k is an adjustable table, in the rear of the machine at a point at the proper height to receive and conduct the corrugated sheet from the machine without producing a curve surface. Upon the automatic and adjustable feed-table the sheet of metal is placed in its backward movement against the gage, so that in its forward movement it will carry the sheet forward snificiently for the rollers to gripe the edge of the sheet. Thus each sheet is introduced to the rollers successively in the same manner, and thereby produces perfect uniformity of corrugated sheets when laid for a covering.

The adjustable gage enables me to produce the same uniformity in all the various widths of sheets. Heretot'ore the sheets have been introduced -by hand to the rollers or by a table moved by hand or other irregular motion or modes, the rollers clasping the sheet at difl'erent points, producing a full corrugation on one sheet and only a small portion of a corrugation on another, making it very difficult to match the sheets without the trouble and waste of stock in trimming the edges to make them uniform.

My adjustable center bearings operated or adjusted by hydraulic or screw pressure will be formed by turning one or more journals,

one to one and a half inch wide, near the center of the corrugated rollers, with bearers fitted thereto and compressed against said N roller-bearin gs by hydraulic or screw pressure; 7

thus producing a great pressure in the center of the rollers, and a uniform crimp or corrugation in the sheet metal, thereby'obviatmg scrious difficulties existing in adjustable corrugated supporting-rollers.

My attachment for suspending the upper roller, constructed as shown in the accompanying drawings, the holding-bars being connected with the under box and suspensionplate, and is operated by the set-screw after the holding-bars are screwed up so that the two-part box is made tight 0n the rollerbearings, or journaled. The suspended roller is moved by the set-screw to any position required to form either a deep or shallow corrugation, and every sheet, whether heavy or light, hard or soft, will receive a uniform impression, and entirely obviate the difficulties heretofore experienced in corrugating sheets of different thickness and ductility, whereas, as is often the case, the depth of the corrugation is required to be deeper, consequently giving more strength for certain purposes, while for others one of less depth is required.

vWith the Weight of the roller on the metal the corrugation on a light sheet will be deeper than on a heavy sheet, causing a serious difficulty in connecting the sheets.

My adjustable elevating-table is to remedy the difficulty, in all corrugating-machines, of having the corrugated sheet, by its own weight, become bent or curved, which is a se rious objection. By this improvement the curved table is hinged to the frame at the rear of the machine near the center, or just below the sheet as it passes from the machine, so that it can be raised or lowered by a screw or its equivalent to accommodate the different thickness of metal, (as light metal Will curve more than heavy,) which will leave'the sheets with a true and level surface.

What I claim, and desire. to secure by Letters Patent, is-

1. The adjustable center-surface bearin gs as supports at center of the corrugating-rolls, substantially as set forth.

2. The adjustable hinged table, arranged and operating substantially as and for the purpose set forth.

FRANKLIN BOYS. [L. s.] Witnesses:

R. R. BLIss, JEREMY W. BLIss. 

